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Old 09-12-18 | 12:12 PM
  #21  
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1nterceptor
LET'S ROLL
 
Joined: Nov 2009
Posts: 4,789
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From: NEW YORK, NY - USA

Bikes: 2014 BMC Gran Fondo, 2013 Brompton S6L-X

Originally Posted by 7renk
My Brompton 2015 model. I want to do 39. Which brand and model do I need to purchase?
In my video on post #2 ; I used a Shimano Dura Ace for 10 speed gruppo. You'll need to shorten the chain. When my chain wore
out; I also swapped to a 10 speed - Shimano Ultegra.

2013 Brompton DA chainring Ultegra chain by 1nterceptor, on Flickr
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